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Method for inhibiting sawtooth rheological phenomenon of nickel-based superalloy

A nickel-based high-temperature alloy and sawtooth technology, applied in the field of alloys, to achieve high feasibility, increase tensile yield strength, and suppress the rheological phenomenon of sawtooth

Pending Publication Date: 2021-07-23
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there are few reports on the suppression method of the sawtooth rheological phenomenon.

Method used

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  • Method for inhibiting sawtooth rheological phenomenon of nickel-based superalloy
  • Method for inhibiting sawtooth rheological phenomenon of nickel-based superalloy
  • Method for inhibiting sawtooth rheological phenomenon of nickel-based superalloy

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A method for suppressing Inconel625 alloy sawtooth rheology, comprising the following steps:

[0032] Step 1: Perform solution treatment on Inconel625 alloy: first machine the sample into a specified size to meet the furnace requirements and ensure that the sample is heated evenly; then raise the temperature of the box-type resistance furnace to 1130°C;

[0033] The heating method is as follows: raise the temperature to 550°C at a rate of 10° per minute, and then raise the temperature to 850°C at a rate of 5° per minute. Then the temperature was raised to 1130° C. at a rate of 3° per minute.

[0034]After the furnace temperature reaches 1130°C, put the sample into the furnace, and pad the bottom of the sample with refractory bricks; the thickness of the refractory bricks shall be determined to ensure that the sample is located in the middle of the furnace.

[0035] After the furnace temperature is stable, start timing and heat preservation for 60 minutes; after the hea...

Embodiment 2

[0043] A method for suppressing Inconel625 alloy sawtooth rheology, comprising the following steps:

[0044] Step 1: Perform solution treatment on Inconel625 alloy: first machine the sample into a specified size to meet the requirements of the furnace and ensure that the sample is heated evenly; then raise the temperature of the box-type resistance furnace to 1150°C;

[0045] The heating method is as follows: raise the temperature to 550°C at a rate of 10° per minute, and then raise the temperature to 850°C at a rate of 5° per minute. Then the temperature was raised to 1150° C. at a rate of 3° per minute.

[0046] After the furnace temperature reaches 1150°C, put the sample into the furnace, and pad the bottom of the sample with refractory bricks; the thickness of the refractory bricks shall be determined to ensure that the sample is located in the middle of the furnace.

[0047] After the furnace temperature is stable, start timing and heat preservation for 55 minutes; after...

Embodiment 3

[0054] A method for suppressing Inconel625 alloy sawtooth rheology, comprising the following steps:

[0055] Step 1: Perform solid solution treatment on Inconel625 alloy: first machine the sample into a specified size to meet the requirements of the furnace and ensure that the sample is heated evenly; then raise the temperature of the box-type resistance furnace to 1100°C;

[0056] The heating method is as follows: raise the temperature to 550°C at a rate of 10° per minute, and then raise the temperature to 850°C at a rate of 5° per minute. Then the temperature was raised to 1100°C at a rate of 3° per minute.

[0057] After the furnace temperature reaches 1100°C, put the sample into the furnace, and pad the bottom of the sample with refractory bricks; the thickness of the refractory bricks shall be determined to ensure that the sample is located in the middle of the furnace.

[0058] After the furnace temperature is stable, start timing and heat preservation for 60 minutes; a...

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Abstract

The invention discloses a method for inhibiting a sawtooth rheological phenomenon of nickel-based superalloy. The method includes the following steps: a heat treatment furnace is heated to a target solution treatment temperature, an Inconel 625 alloy sample is put into a hearth of the heat treatment furnace, the Inconel 625 alloy sample is immediately taken out of the heat treatment furnace after the solution treatment heat preservation time is reached, and the Inconel 625 alloy sample is quenched and cooled to the room temperature; the target solution treatment temperature is higher than the temperature of the MC type carbide precipitate of the Inconel 625 alloy, and the solution treatment heat preservation time is t1 = (d * 0.6 + 40) min-(d * 0.6 + 80) min; the Inconel 625 alloy sample obtained after solution treatment is put into the hearth, and then the temperature of the heat treatment furnace is increased to the target aging treatment temperature; after the aging treatment heat preservation time is reached, the Inconel 625 alloy sample is taken out, and quenched and cooled to the room temperature; and the target aging temperature is within the temperature interval of precipitating gamma ''-delta phases in the Inconel 625 alloy, and the aging treatment heat preservation time is 200-800 h. The method can effectively inhibit the sawtooth rheological phenomenon.

Description

technical field [0001] The application belongs to the field of alloy technology, and in particular relates to a method for suppressing sawtooth rheological phenomena of nickel-based superalloys. Background technique [0002] Superalloys refer to a class of metal materials that can work above 600 °C, have oxidation resistance and corrosion resistance, and can work for a long time under a certain stress. Superalloys are not only the key materials for the hot end parts of aero-engines, but also the materials for high-temperature corrosion-resistant parts required by industrial sectors such as energy and chemical industry. They are an important material that is indispensable to the national economy. There are many kinds of high-temperature alloys. Among many high-temperature alloys, nickel-based high-temperature alloys are used in the largest amount and in the widest range. Key components of aero-engines, such as turbine blades, combustion chambers, and even turbochargers also u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/10
CPCC22F1/10C22F1/002
Inventor 李金山樊江昆刘栩东唐斌王军寇宏超袁睿豪陈彪
Owner NORTHWESTERN POLYTECHNICAL UNIV
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